ibmvmc_return_hmc(9)

✨ ibmvmc_return_hmc(9) ✨

okay so this is a page from the Kernel API Manual (ibmvmc_return_hmc(9)) and honestly bestie, it's a short one but it's important, so let's get into it 💅

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🌸 NAME 🌸

ibmvmc_return_hmc — give that HMC connection back, no cap 🔄

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🦋 SYNOPSIS 🦋

int ibmvmc_return_hmc (struct ibmvmc_hmc *hmc , bool release_readers );

like, that's the whole signature, she's compact and she knows it 💖

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🎀 ARGUMENTS 🎀

• hmc — the ibmvmc_hmc struct. yep. that's the whole description. the struct of it all 🫶
• release_readers — the number of readers connected to the session 👀 (that's what the page says, and we're not gonna editorialize on it, periodt)

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⭐ DESCRIPTION ⭐

so what does she do? this function releases the HMC connections back into the pool. that's it. that's the vibe. connections go back in the pool, the pool stays fed, everybody's hydrated 💧✨

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🔥 RETURN 🔥

• 0 — Success 🎉 slay
• Non-zero — Failure 😭 it's giving "something went wrong"

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💜 SEE ALSO 💜

the kernel file lives at ./drivers/misc/ibmvmc.c and omg the friend group is huge, here's the whole squad 🫶:

h_request_vmc(9), ibmvmc_handle_event(9), ibmvmc_release_crq_queue(9), ibmvmc_reset_crq_queue(9), crq_queue_next_crq(9), ibmvmc_send_crq(9), alloc_dma_buffer(9), free_dma_buffer(9), ibmvmc_get_valid_hmc_buffer(9), ibmvmc_get_free_hmc_buffer(9), ibmvmc_free_hmc_buffer(9), ibmvmc_count_hmc_buffers(9), ibmvmc_get_free_hmc(9), ibmvmc_send_open(9), ibmvmc_send_close(9), ibmvmc_send_capabilities(9), ibmvmc_send_add_buffer_resp(9), ibmvmc_send_rem_buffer_resp(9), ibmvmc_send_msg(9), ibmvmc_open(9), ibmvmc_close(9), ibmvmc_read(9), ibmvmc_poll(9), ibmvmc_write(9), ibmvmc_setup_hmc(9), ibmvmc_ioctl_sethmcid(9), ibmvmc_ioctl_query(9), ibmvmc_ioctl_requestvmc(9), ibmvmc_ioctl(9), ibmvmc_add_buffer(9), ibmvmc_rem_buffer(9), ibmvmc_process_capabilities(9), ibmvmc_validate_hmc_session(9), ibmvmc_reset(9), ibmvmc_reset_task(9), ibmvmc_process_open_resp(9), ibmvmc_process_close_resp(9), ibmvmc_crq_process(9), ibmvmc_handle_crq_init(9), ibmvmc_handle_crq(9), ibmvmc_init_crq_queue(9)

like genuinely, read all of them, iykyk 📚✨

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and that's the page!! source is ./drivers/misc, dated October 2026, and she ate, no crumbs 🍓🧚💜